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Effects of pH and Cl? Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution
Yuan,Xuwen1,2,3; Wang,Xuan2,3; Yang,Huaiyu2
Corresponding AuthorYuan,Xuwen() ; Yang,Huaiyu()
2022-03-01
Source PublicationJournal of The Electrochemical Society
ISSN0013-4651
Volume169Issue:3
AbstractThe degradation behavior of four prepassivated stainless steels (SSs) in the alkaline solutions with different Cl? concentrations and pH values were investigated by cyclic potentiodynamic polarization (CPP), electrochemical impedance spectroscopy (EIS) and Mott-Schottky analysis and the X-ray photoelectron spectroscopy (XPS). The results indicated that the pH value and Cl? concentration, together with the phase ratio difference in the microstructure of SS, played a critical role in the degradation process of passive film. At low pH and high Cl? concentration, the passive film gradually enriched in Fe3+ and Cr3+ species and depleted in Fe2+ oxides and its self-regeneration process became more difficult. As the pH decreased, the passive film exhibited clear n-type and p-type semiconductor characteristics more clearly, and the decrease in dopant density well reflected the changes in Fe2+/Fe3+ ratio and electrochemical behavior. Based on the viewpoint of adsorption balance between OH? with inhibitory effect and Cl? with promotion effect on the degradation process, a mechanism for the degradation process of prepassivation film was proposed.
DOI10.1149/1945-7111/ac595b
Language英语
WOS IDIOP:jes_169_3_031506
PublisherIOP Publishing
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173145
Collection中国科学院金属研究所
Corresponding AuthorYuan,Xuwen; Yang,Huaiyu
Affiliation1.Department of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, People’s Republic of China
2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
3.School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, People’s Republic of China
Recommended Citation
GB/T 7714
Yuan,Xuwen,Wang,Xuan,Yang,Huaiyu. Effects of pH and Cl? Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution[J]. Journal of The Electrochemical Society,2022,169(3).
APA Yuan,Xuwen,Wang,Xuan,&Yang,Huaiyu.(2022).Effects of pH and Cl? Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution.Journal of The Electrochemical Society,169(3).
MLA Yuan,Xuwen,et al."Effects of pH and Cl? Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution".Journal of The Electrochemical Society 169.3(2022).
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